Gas-analysis apparatus.



PATBNTED JAN. 6, 1903.

M. ARNDT. GAS ANALYSIS APPARATUS.

A?PLICATION FILED MAY 19, 1902.

H0 MODEL.

ifiiininliildllulnddunn Nrrnn Sfrnfrns MAX ARNDT, OF AlX-LA-CHAPELLE, GERMANY.

GAS-ANALYSiS APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 717,654, dated January 6, 1903.

Application led May 19, l902. Serial No. 108,016. (No model.)

To @ZZ whom, it ntotjoonoern:

Be it known that I, MAX ARNDT, a subject of the King ot' Prussia, Emperor of Germany, residing at No. 35 Aureliusstrasse, in the city of AiX-la-Chapelle, Rhine Province, in the German Empire, have invented a new and useful Device for Transferring Sam ples of Gas to a Gas-Absorption Apparatus, of which the following is a specification.

My invention relates to a device for taking a sample of gas by suctionfrom a gaseous mixture and conducting such sample to a gasabsorption apparatus. Y

My invention comprises, in combination,

three principal pieces of apparatus-first, a,

dipping or sampling vessel having an aperture at the bottom and provided at the top with a narrow tube connecting with the absorptionspace of a gas-absorption apparatus, as also with a tube descending toward the aperture, but terminating above the same second, a receptacle containing aliquid for the purpose of makin g a seal and provided with an inlet and an outlet for the gaseous mixture, and, third, a gas-absorption apparatus.

In the annexed drawings, Figure l shows a vertical section of the entire apparatus. Figla is a detail view showing in elevationand part section a kdevice for mechanically moving the dipping vessel. Fig. 2 shows in vertical section and part elevation a modification of the complete apparatusin combination with a.

registering device. Fig. 3 is a detail view showing a vertical section of a modified construction of the dipping vessel.

Referring more particularly to Fig. l of the drawings, lis a receptacle containing the sealing liquid 2. Y

3 is the dipping vessel, having an inlet and outlet tube 4.

5 is a tube connected to the top of the vessel 3. 6 is a tube conducting from the top of the latter downward, but terminating above the level of the mouth of the tube 4.

7 is an inlet-tube for the gaseous mixture, and 3 is an outlet for the same.

The gas enters at 7 in the direction of the arrow I into the receptacle l and escapes at 8 in the direction of the arrow Il.

20 is a bend connecting the tube 5 with a length of rubber tubing 21, conducting to the absorption vessel 22, containing the absorption liquid 23.

24 is a tube conducting to-a vessel 25. 23a^is a ilexible tube by means of which the liquid 23 may be run out of the vessel 22. 27 is a short tube by means of which the vessel 25 communicates with the atmosphere. 26 is a scale provided on the vessel 25 for reading oli the analysis resulting through absorption, and 2S is a mark on the vessel 25,

The apparatus operates as follows: The gaseous mixture to be analyzed enters through the tu be into the receptacle l in the direction of the arrow I and leaves lthrough the tube 8 inthe direction of the arrow II. l dipping vessel 3 Vis now descended below the The level of the liquid 2tolthe dotted-line position, the tube 5 remaining open above. The liquid 2 will till the vessel 3 and a portion of the tube 5. lf now the latter is closed with Athe linger and the vessel 3 raised, this latter tion of the column of liquid 'in the vessel 3,

some of the absorption liquid in the vessel 22 will rise in the tubing 2l, so that the level vof this liquid 23 in the tube 24 will sink below themark 2S. Immediately, however, the bottom of the tube 6 stands above the level of the sealin g liquid 2 the vessel 3 will empty itself through thetube 4, and the liquid 2 in running out will suck in gas from the recep tacle l through the tube 6, so that the vessel 3 will become filled with the latter. At the same time atmospheric pressure will again have been established in the absorption vessel 22 and the liquid 23 returned to the normal level 2S. lf now the vessel'3 is somewhat sunk, it will at the moment in which the tube 6 againy dips into the liquid 2 take upja certain volume of gas. It the vessel 3 is then immersed until it occupies the dottedline position, the pressure will drive the sample of gas out of the vessel 3 through the pipe 5 and tubing 2l into the vessel 22, and the pressure of the gas thus expelled will further compress a portion of the liquid 23 through the tube 24 into the air-space in the vessel 25, in which the liquid 23 will ascend the less the larger the quantity of gas from the sample which is absorbed, so that the IOO quantity of gas actually absorbed can be read off on the scale 26. If now, finally, the tube 5 is opened, the liquid 23 will return to the normal level 28, and the remaining gas in the vessel 22 will be driven out through the tube 27, so that the apparatus is again ready for a fresh analysis. l

The dipping vessel 3 can be raised and lowered mechanically by means of the apparatus shown in Fig. 11. For the purpose in View the Vessel 3 is secured by its tube 5 to'one arm of a hinged device 14, to the other arm of which is attached a cord 16, passing over a pulley 17, whereby the vesse13 is suspended. Pivoted to the bracket 14, at the point 15, is a double-armed lever 13L 13b, the latter arm of which is provided with a Valve 11, controlling the mouth of the tube 5. If in the ascent the lever-arm 13 strikes a stop 1S, or it' in the descent the lever-arm 13b contacts with alstop 19, the valve 1l will be opened. In the intermediate positions ot' the lever 13 13b between the stops 18 19 the valve 11 is kept closed by a spring 12.

Fig. 2 shows an apparatus in which the vessel 3 is rigidly secured to the receptacle l, and the inlet and outlet tubes 7 and 8, as also the tube 5, extended upward so far that the sealing liquid 2 cannot overflow from these tubes when the reservoir 9 is raised to its maximum height. The tube. 5 is closed by the valve 11, maintained in closed condi- `Iion by the spring 12 and capable of being opened bydepression of the lever 13, pivoted to the arm 14. The Vessel 25 is connected by the tubing 24 with the Vessel 22. In the vessel 25 is arranged a float 29, counterbalyaround the rotating drum 33.

anced by a weight 30, attached to a cord passing over a pulley 3l. The cord also controls a pencil 32, marking the paper strip wrapped 4o Immediately the float 29 is sufticiently buoyed up by the liquid 23 rising in the vessel 25 the pencil 32 will record the result of the analysis.

Fig. 3 shows a dipping vessel upon which the scale is marked directly. In this case the vessels 1 and 3 are made of glass, and the analyses are read off after the absorption di- K rectly the liquid 2 in the vessel 1 and in vessel 3 attains the same level, the -valve 11 remaining closed.

Having thus described my invention, what I claim as new is- In an apparatus for taking up samples of gas and transferring them to a gas-absorption device, the combination of areceptacle, partly filled with liquid, to receive the gaseous mixture; a sampling vessel contained in said receptacle, having an aperture at the bottom and a tube descending from the top and terminating above the level of said aperture; and a vessel filled with a gas-absorbing liquid, communicating with said sampling vessel; and means for indicating the change in volume through absorption, all substantially as described.

In testimony that I claim the foregoing as my invention I have signed'my name in presence of two subscribing Witnesses.

MAX ARNDT.

Witnesses:

JOHN B. ADAMS, H. QUADFLIEG. 

